////////////////////////////////////////////////
// DESCRIPTION:
//     Class implementationn for device driver
//     access to a parent bus
//
// Legal Notices:
//     Copyright (c) 2008, Telliam Consulting, LLC.
//     All rights reserved.
//
//     Redistribution and use in source and binary forms, with or without modification,
//     are permitted provided that the following conditions are met:
//
//     * Redistributions of source code must retain the above copyright notice,
//       this list of conditions and the following disclaimer.
//
//     * Redistributions in binary form must reproduce the above copyright notice,
//       this list of conditions and the following disclaimer in the documentation
//       and/or other materials provided with the distribution.
//
//     * Neither the name of Telliam Consulting nor the names of its contributors
//       may be used to endorse or promote products derived from this software
//       without specific prior written permission.
//
// Disclaimer:
//     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
//     ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
//     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
//     IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
//     INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
//     BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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//

#include <Windows.h>
#include <TCHAR.h>
#include <FusionWare\DFX\StreamAPI.h>

using namespace FusionWare::DFX;

bool ParentBusDriver::Open(const TCHAR* pRegPath)
{
    DEVMGR_DEVICE_INFORMATION di;
    HANDLE hParent;
    
    // Close any open that might be around. 
    if(!Close())
        return FALSE;

    // Get the Active handle for this driver from its active key
    HANDLE hDevice = GetDeviceHandleFromContext(pRegPath);
    if(hDevice == NULL)
        return FALSE;

    // Get the device information for the driver. 
    memset(&di, 0, sizeof(di));
    di.dwSize = sizeof(di);
    if(!GetDeviceInformationByDeviceHandle(hDevice, &di))
        return FALSE;

    // Store and validate the active handle for the parent bus
    hParent = di.hParentDevice;
    if(hParent==NULL)
        return FALSE;

    // make a copy of the device bus name.
    this->pDeviceBusName = di.szBusName;
    if(this->pDeviceBusName.empty())
    {
        SetLastError(ERROR_NOT_ENOUGH_MEMORY);
        return FALSE;
    }
    
    // Get the device information for the bus driver from it's active handle
    memset(&di, 0, sizeof(di));
    di.dwSize = sizeof(di);
    if(!GetDeviceInformationByDeviceHandle(hParent, &di))
        return FALSE;

    // Finally open the bus driver by it's File System name.
    return BusDriver::Open(di.szBusName);
}

bool ParentBusDriver::Close()
{ 
    return BusDriver::Close();
}
